VIENNA – Austrian leaders called Thursday for more legal options to fight extremism and for an overhaul of the country’s domestic intelligence agency in the wake of this week’s deadly attack blamed on a known Islamic radical who Austrian authorities had been warned had tried to buy ammunition in neighboring Slovakia.The gunman, identified as 20-year-old Kujtim Fejzulai, had a previous conviction for trying to join the Islamic State group in Syria and had been given early release in December.A dual national of Austria and North Macedonia, Austrian authorities said they were unable to revoke Fejzulai's Austrian citizenship after his conviction and that he had duped the justice system’s deradicalization program after his release into thinking.